<!-- 模态框公共部分界面 -->
<template>
    <view v-if="showPopup" class="uni-popup">
        <!-- 遮罩层结构 -->
        <view 
            :class="[ani, animation ? 'ani' : '', !custom ? 'uni-custom' : '']" 
            class="uni-popup__mask" 
            @click="close(true)" 
        />
        <!-- 弹窗主题利用插槽 -->
        <view 
            :class="[type, ani, animation ? 'ani' : '', !custom ? 'uni-custom' : '']" 
            class="uni-popup__wrapper" 
            @click="close(true)"
        >
            <view class="uni-popup__wrapper-box" @click.stop="clear">
                <slot />
            </view>
        </view>
    </view>
</template>
<script>
    export default {
        name: 'UniPopup',
        props: {
            // 开启动画
            animation: {
                type: Boolean,
                default: true
            },
            // 弹出层类型，可选值，top: 顶部弹出层；bottom：底部弹出层；center：全屏弹出层
            type: {
                type: String,
                default: 'center'
            },
            // 是否开启自定义
            custom: {
                type: Boolean,
                default: false
            },
            // maskClick
            maskClick: {
                type: Boolean,
                default: true
            },
            show: {
                type: Boolean,
                default: true
            }
        },
        data() {
            return {
                ani: '', // 动画样式类名
                showPopup: false
            }
        },
        watch: {
            show(newValue) {
                if (newValue) {
                    this.open()
                } else {
                    this.close()
                }
            }
        },
        created() {},
        methods: {
            clear() {},
            open() {
                this.$emit('change', {
                    show: true
                })
                this.showPopup = true
                this.$nextTick(() => {
                    setTimeout(() => {
                        this.ani = 'uni-' + this.type
                    }, 30)
                })
            },
            close(type) {
                if (!this.maskClick && type) return
                this.$emit('change', {
                    show: false
                })
                this.ani = ''
                this.$nextTick(() => {
                    setTimeout(() => {
                        this.showPopup = false
                    }, 300)
                })
            }
        }
    }
</script>
<style>
    @charset "UTF-8";

    .uni-popup {
        position: fixed;
        top: 0;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 998;
        overflow: hidden
    }

    .uni-popup__mask {
        position: absolute;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        z-index: 998;
        background: rgba(0, 0, 0, .4);
        opacity: 0
    }

    .uni-popup__mask.ani {
        transition: all .3s
    }

    .uni-popup__mask.uni-bottom,
    .uni-popup__mask.uni-center,
    .uni-popup__mask.uni-top {
        opacity: 1
    }

    .uni-popup__wrapper {
        position: absolute;
        z-index: 999;
        box-sizing: border-box
    }

    .uni-popup__wrapper.ani {
        transition: all .3s
    }

    .uni-popup__wrapper.top {
        top: 0;
        left: 0;
        width: 100%;
        transform: translateY(-100%)
    }

    .uni-popup__wrapper.bottom {
        bottom: 0;
        left: 0;
        width: 100%;
        transform: translateY(100%)
    }

    .uni-popup__wrapper.center {
        width: 100%;
        height: 100%;
        display: flex;
        justify-content: center;
        align-items: center;
        transform: scale(1.2);
        opacity: 0
    }

    .uni-popup__wrapper-box {
        position: relative;
        box-sizing: border-box
    }

    .uni-popup__wrapper.uni-custom .uni-popup__wrapper-box {
        padding: 30upx;
        background: #fff
    }

    .uni-popup__wrapper.uni-custom.center .uni-popup__wrapper-box {
        position: relative;
        max-width: 80%;
        max-height: 80%;
        overflow-y: scroll
    }

    .uni-popup__wrapper.uni-custom.bottom .uni-popup__wrapper-box,
    .uni-popup__wrapper.uni-custom.top .uni-popup__wrapper-box {
        width: 100%;
        max-height: 500px;
        overflow-y: scroll
    }

    .uni-popup__wrapper.uni-bottom,
    .uni-popup__wrapper.uni-top {
        transform: translateY(0)
    }

    .uni-popup__wrapper.uni-center {
        transform: scale(1);
        opacity: 1
    }
</style>
